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I don't smoke fish and really don't eat them either but just want you to know I moved your thread to the "Fish" forum, I think you will get a lot more exposure over here.
I see this is your first post here, when you get a minute would you do us a favor and go to Roll Call and introduce yourself so we can get to know you and give you a proper welcome, also would you add your location to your profile, we like knowing where you are when we talk to you, Thanks!
Freezing does make a minor difference in most smoked products but very minimal difference. I've been doing a lot of smoked trout nuggets lately and freezing them. I will say there is a little extra moisture after thawing them (expected) but the flavor overall hasn't changed. If it tastes good prior to freezing then it'll taste good after thawing. I am speaking on my own experience and I vacuum seal my fish so I can't vouch for fish not vacuum sealed.
I cure it in a bring (brown sugar, salt, and white sugar) overnight. then I cut it into chunks (about 4" ), rub them with honey, and smoke it at 180 for four hours and 220 for two hours. the fish is steelhead.
For fish like salmon/steelhead I typically vac-pac it and freeze it. Ours usually doesn't last more than a few months. My grandmother prefers to can her smoked salmon/steelhead and trout. Here is an article on canning:
I've smoked, canned or frozen plenty of salmon. When freezing, I vacuum pack and have had no problem with using it up to 9 months after freezing. I think that's longer than recommended, but works for me. AJ